In the autofs script responsible for starting, restarting... automount (/etc/rc.d/init.d/autofs), the lock file is called automount. However, in the rc script (/etc/rc.d/rc) will only stop the automount if a lock file named autofs is found. This could result in some hanging when stoping a machine with nfs mounted file systems. A quick fix is therefore to rename all the occurences of the lock file name to autofs in the /etc/rc.d/init.d/autofs script.
This is fixed in the latest Raw Hide release.